CN116087594A - Open-close type all-fiber current transformer fiber sensitive ring - Google Patents
Open-close type all-fiber current transformer fiber sensitive ring Download PDFInfo
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- CN116087594A CN116087594A CN202211614596.5A CN202211614596A CN116087594A CN 116087594 A CN116087594 A CN 116087594A CN 202211614596 A CN202211614596 A CN 202211614596A CN 116087594 A CN116087594 A CN 116087594A
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- current transformer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
- G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model provides an open-close type all-fiber current transformer optic fibre sensitive ring, sensitive ring body is open-close type structure, accessible connecting device opens and shuts between reflector protection component and the support body, sensitive optic fibre and 1/4 wave plate are arranged in the support body recess, sensitive ring's open and shut is realized by four articulated square pipes, square pipe end-to-end connection reflector protection component, the intraductal armor cable that wears of having in side, armor cable one end is connected with L type body through sealing joint, one end and reflector protection component are connected, the sensitive optic fibre that the reflector links is through intraductal armor cable and L type body and polarization maintaining optical fiber fusion splice in 1/4 wave plate department, polarization maintaining optical fiber leads to the photoelectric signal processing unit as the leading-out terminal of whole optic fibre sensitive ring. The invention has flexible application mode, small volume, light weight and low cost; the installation mode is flexible and various, and the installation cost is saved; the design is flexible and simple, and the installation and maintenance are easy; the safety and the reliability of the all-fiber current transformer are improved.
Description
Technical Field
The invention relates to the technical field of electrical technology and equipment, in particular to an optical fiber sensitive ring of an open-close type all-fiber current transformer.
Background
Along with the development of a power system to a high-voltage and high-current direction, the traditional electromagnetic current transformer has the defects of large and heavy size of a sensitive ring, difficult installation, high cost, complex insulation structure, magnetic saturation phenomenon and other engineering technologies although the traditional electromagnetic current transformer is mature. The Rogowsgi coil type electronic current transformer has no magnetic saturation phenomenon of a sensitive ring, but has an active circuit at a high voltage side, so that the reliability of the transformer can be influenced to a certain extent, and the sensitive ring has higher requirements on secondary load and installation, and magnetic shielding is needed. Magneto-optical glass type and all-fiber electronic type current transformers based on optical sensing technology have the characteristics of no magnetic saturation, high safety and the like, and are always widely paid attention to at home and abroad. The all-fiber electronic current transformer adopts an all-fiber optical path, and has higher reliability and precision than the magneto-optical glass type transformer, so that the all-fiber electronic current transformer becomes the main stream direction of international optical current transformer development.
The all-fiber electronic current transformer is an emerging electric power metering protection device based on Faraday magneto-optical effect principle and using optical fiber as medium. The sensitive ring is a sensitive element of the all-fiber electronic current transformer, and the design of the sensitive ring plays a critical role in the safety and reliability of the all-fiber electronic current transformer in the application of a power system.
In many power systems and metallurgical fields, such as the measurement of large currents of anodes and cathodes in the electrolytic aluminum industry, a large-current busbar conductor cannot be disconnected and an anode rod can be replaced frequently, if current measurement is needed, an optical fiber sensitive ring is needed to be opened and closed frequently on site; in some high-voltage power occasions, current measurement needs to be performed on certain lines, but a high-voltage bus or a primary cable cannot be disconnected, for example, an optical fiber current transformer is installed on a running transformer, a power distribution switch cabinet in-and-out line position and the like under the condition that primary connection is not disconnected, and then the optical fiber current transformer capable of performing on-site openable and closable operation under the condition that the bus is not disconnected is required. Other fields, such as ITER, ship power and the like, widely have the requirement, and the existing optical fiber current transformer adopts an integrated design scheme, and needs to install a sensitive ring before installing a conductor, which brings great inconvenience to engineering application.
Disclosure of Invention
The invention solves the technical problems that: the utility model provides a overcome the not enough of prior art, provides an open-close type all-fiber current transformer optic fibre sensitive ring, this mutual-inductor convenient operation, small and exquisite nimble, small, light in weight, environmental protection, security are high, have solved the problem that need measure the electric current but inconvenient dismantlement primary conductor in the electric power system. Flexible measurement of conductor current without breaking the primary conductor can be achieved.
The technical scheme of the invention is as follows:
an optical fiber sensitive ring of an open-close type all-fiber current transformer comprises a sensitive ring body and a reflector protection assembly;
the sensing ring body comprises a supporting body, a sensing optical fiber, a hinged square tube and a transition end block, wherein one end of the supporting body is sequentially hinged with a plurality of hinged square tubes, the transition end block is fixedly connected to the end part of the hinged square tube, and the sensing optical fiber is positioned in the supporting body, sequentially penetrates through the plurality of hinged square tubes and finally is connected with the reflector protection assembly through the transition end block;
the reflector protection assembly is connected to one end of the transition end block, the supporting body is provided with a connecting device, and the reflector protection assembly is locked on the supporting body through the connecting device.
The sensitive ring body further comprises two waterproof sealing joints, one end of the first waterproof sealing joint is fixedly connected to the position, where the sensitive optical fiber penetrates out, of the L-shaped supporting body, the other end of the first waterproof sealing joint penetrates into the first hinged square tube, and the second waterproof sealing joint is connected between the last hinged square tube and the transition end block.
The support body is provided with a groove, and is connected with an upper cover, and the upper cover is fixed on the upper part of the support body and seals the groove.
The position of the sensitive optical fiber between the two waterproof sealing joints is an armored optical cable.
The two hinged square pipes are connected through a stopper screw to serve as a rotating shaft, and the stopper screw is rotated to be used for adjusting the hinge tightness.
The support body comprises two sections of long strip parts with one end integrally connected, and an included angle between the two sections of long strip parts is 60-120 degrees.
The reflector protection assembly comprises a reflector, a bracket, a sleeve head and a locking part, wherein the bracket is fixedly connected with the transition end block, the reflector is placed in the bracket accommodating groove for protection, the sleeve head is connected to the end part of the bracket, the side surface of the sleeve head is protruded relative to the bracket to form a protruding part, and the locking part is connected to one side of the protruding part, which is opposite to the bracket;
the connecting device comprises an inserting groove, a reed and a locking counter bore, the inserting direction of the inserting groove is the length direction of the groove of the supporting body, the width of the long side of the supporting body is the width of the inserting groove, the inserting groove is a tiger mouth type, the locking counter bore is matched with the locking part, and the reed is arranged on one side of the supporting body combined with the protection component. The locking part is a spring plunger, the spring plunger comprises a column body, a spring and a sphere, the spring is positioned in the column body, the sphere is positioned at one end of the column body, which is opposite to the bracket, the spring abuts against the sphere, and the sphere is opposite to the locking counter bore.
The bracket is provided with a containing groove, the width of the middle part of the containing groove is smaller than the width of the two ends, the reflector is positioned at the position with larger width of the containing groove, and the position with smaller width of the middle part is used for blocking the movement of the reflector in the containing groove.
The sensitive optical fiber is connected with a 1/4 wave plate, the 1/4 wave plate is arranged in a groove of the supporting body, and the 1/4 wave plate is arranged right above the reflecting mirror;
the optical fiber connected with the rear end of the 1/4 wave plate can transmit the optical signal in the sensitive ring to the rear-end photoelectric signal processing unit.
In summary, the present application at least includes the following beneficial technical effects:
(1) The optical fiber sensitive ring of the open-close type all-fiber current transformer adopts an open-close type structure, can carry out portable measurement on conductor current on an engineering site, and has the advantages of convenient operation, small volume, light weight and low cost;
(2) The optical fiber sensitive ring of the open-close type all-fiber current transformer can be installed on various parts such as an inner conductor of a switch cabinet, a transformer bushing lifting seat, a wall bushing root and the like for long-term use under the condition that a primary conductor is not dismounted, the protection level is high, the installation mode is flexible and various, and the installation cost is saved.
(3) The open-close type all-fiber current transformer optical fiber sensitive ring adopts a through type scheme, so that the problems of dynamic stability and thermal stability of the all-fiber current transformer are not required to be considered. The safety and the reliability of the all-fiber current transformer are improved.
Drawings
FIG. 1 is a general block diagram of the present invention;
FIG. 2 is a cross-sectional view of a reflector shielding assembly of the present invention;
FIG. 3 is a block diagram of a mirror bracket of the present invention;
fig. 4 is a schematic diagram of a connection structure between the reflector protection assembly and the support body, wherein the upper diagram is a schematic diagram of a structure of the support body in an outer direction of a long side, and the lower diagram is a schematic diagram of a structure of an inner side of the support body.
Reference numerals illustrate: 1. a support body; 2. a sensitive optical fiber; 3. an upper cover; 4. a waterproof sealing joint; 5. a first hinged square tube; 6. the second hinged square tube; 7. an armored optical cable; 8. plugging a screw; 9. a third hinged square tube; 10. a transition end block; 11. a reflector protection assembly; 12. a reed; 13. a 1/4 wave plate; 14. a reflecting mirror; 15. a bracket; 16. a sleeve head; 17. spring plunger.
Detailed Description
The present application is described in further detail below with reference to the attached drawing figures and specific examples:
the embodiment of the application discloses an optical fiber sensitive ring of an open-close type all-fiber current transformer, which is shown in fig. 1 and comprises a sensitive ring body and a reflector protection assembly 11.
The sensitive ring body comprises a supporting body 1, sensitive optical fibers 2, an upper cover 3, a waterproof sealing joint 4, a first hinged square tube 5, a second hinged square tube 6, an armored optical cable 7, a plugging screw 8, a third hinged square tube 9, a transition end block 10, a reed 12 and a 1/4 wave plate 13. In this embodiment, the support body 1 is an L-shaped support body 1, and the upper cover 3 is correspondingly an L-shaped upper cover 3.
The sensitive ring body adopts an openable structure, one side of the L-shaped supporting body 1 is provided with a groove, the sensitive optical fiber 2 is arranged in the groove, and the L-shaped upper cover 3 is fixed on the upper part of the L-shaped supporting body 1 and seals the groove, so that the tightness in the groove is ensured. The L-shaped support body 1, the first hinged square tube 5, the second hinged square tube 6 and the third hinged square tube 9 are all connected in a hinged mode, the four hinged square tubes can be straightened and unfolded along the short arm direction of the L-shaped support body 1 in an open state, and the third hinged square tube 9 is connected with the reflector protection assembly 11 through the transition end block 10.
The waterproof sealing joints 4 are arranged in two, the first waterproof sealing joint 4 is connected between the L-shaped support body 1 and the first hinged square tube 5, and the second waterproof sealing joint 4 is connected between the third hinged square tube 9 and the transition end block 10. The first waterproof sealing joint 4 one end fixed connection is in L type supporting body 1 in sensitive optic fibre 2 position, the other end penetrates in first articulated side pipe 5, and sensitive optic fibre 2 is connected to waterproof sealing joint 4's one end, armor optical cable 7 is connected to the other end, after the armor optic fibre is worn out from L type supporting body 1's one end, pass first articulated side pipe 5, second articulated side pipe 6, third articulated side pipe 9 in proper order according to its articulated order. The armored optical fiber is adopted, so that the tightness of the optical fiber at the positions of the several sections of hinged square tubes is ensured. The second waterproof sealing joint 4 passes through the third hinged square tube 9 and the transition end block 10, and the second waterproof sealing joint 4 is fixedly connected with the third hinged square tube 9 and the transition end block 10.
One end of the armored optical cable 7 is connected with the L-shaped supporting body 1 through the first waterproof sealing joint 4, the other end of the armored optical cable passes through the four hinged square tubes and then is fixedly connected with the transition end block 10 through the second waterproof sealing joint 4, and sealing treatment is carried out between the transition end block 10 and the reflector protection assembly 11.
The plugging screw 8 can be used as a rotation shaft between the hinged square tubes and can also be used for adjusting the hinged tightness.
As shown in fig. 2 and 3, the mirror guard assembly 11 includes a mirror 14, a sensitive fiber 2, a bracket 15, a ferrule 16, and a spring plunger 17. The bracket 15 fixed connection is in transition end block 10 and deviates from the one side of third articulated side pipe 9, pullover 16 and bracket 15 fixed connection, set up the holding groove on the bracket 15, the armor optical cable 7 is connected to the one end of second waterproof sealing joint 4, sensitive optic fibre 2 is connected to the other end, sensitive optic fibre 2 passes transition end block 10 and is connected with speculum 14, speculum 14 is arranged in the holding groove, the middle part width of holding groove is less than both ends width, speculum 14 is located the great position of holding groove width, the removal of speculum 14 in the holding inslot can be stopped to the position of the less width in middle part, the stability of speculum 14 has been improved.
As shown in the upper and lower diagrams of fig. 4, the sleeve head 16 is connected to one end of the bracket 15, the side surface of the sleeve head 16 protrudes relative to the bracket 15 to form a protruding part, the spring plunger 17 is connected to the protruding part, the axis of the spring plunger 17 is parallel to the axis of the reflecting mirror 14, the spring plunger 17 comprises a cylinder, a spring and a ball body, the spring is positioned in the cylinder, the ball body is positioned at one end of the cylinder opposite to the bracket 15, and the spring abuts against the ball body. The L-shaped supporting body 1 is provided with an insertion groove below the groove, the insertion groove is in a tiger mouth shape, the reed 12 is arranged on the upper part of the insertion groove and is positioned on the inner side of the long side of the supporting body 1, the insertion direction of the insertion groove is parallel to the length direction of the groove, the width of the long side of the supporting body is the width of the insertion groove, and the other side surface of the long side of the supporting body 1 opposite to the reed 12 is provided with a locking counter bore matched with a ball body of the spring plunger 17. When the reflector protection assembly 11 gradually enters the insertion groove along the length direction of the insertion groove, the transition end block 10 is in contact with the yellow sheet and gradually compresses the reed 12, and then the reflector protection assembly 11 is transversely moved along the width direction of the insertion groove until the ball body of the spring plunger 17 is clamped into the locking counter bore, and at the moment, the reflector protection assembly 11 is loosened, so that the reflector protection assembly 11 and the L-shaped support body 1 are locked. The reflector protection assembly 11 can be clamped with the L-shaped support body 1 through the spring plunger 17 under the pretightening force of the reed 12, so that the connection between the reflector protection assembly 11 and the L-shaped support body 1 is more convenient, and the optical fiber sensitive ring can be opened and closed by one hand without disassembling any parts.
The sensitive optical fiber 2 and the 1/4 wave plate 13 are arranged in the groove of the L-shaped supporting body 1, wherein the 1/4 wave plate 13 is arranged at the position right above the reflecting mirror 14, and the optical fiber connected with the rear end of the 1/4 wave plate 13 can transmit optical signals in the sensitive ring to the rear-end photoelectric signal processing unit.
The whole optical fiber sensitive optical fiber 2 is of a sealed structure, the sensitive optical fiber 2 and the armored optical cable 7 are subjected to sealing treatment, and the whole protection level is IP65.
The invention relates to a scheme design of an optical fiber sensitive ring of an open-close type all-fiber current transformer, which can realize field portable measurement of current without disconnecting a current busbar and can be applied to the fields of high-voltage power, direct-current metallurgy and the like. The optical fiber sensitive ring of the open-close type all-fiber current transformer solves the problems in the prior art and brings great convenience to engineering implementation.
While the invention has been described in terms of the preferred embodiment, it is not intended to limit the invention, but it will be apparent to those skilled in the art that variations and modifications can be made without departing from the spirit and scope of the invention, and therefore the scope of the invention is defined in the appended claims.
Claims (10)
1. An open-close type all-fiber current transformer optical fiber sensing ring is characterized in that: comprises a sensitive ring body and a reflector protection assembly (11);
the sensing ring body comprises a supporting body (1), a sensing optical fiber (2), a hinged square tube and a transition end block (10), wherein one end of the supporting body (1) is sequentially hinged with a plurality of hinged square tubes, the transition end block (10) is fixedly connected to the end part of the hinged square tube, and the sensing optical fiber (2) is positioned in the supporting body (1), sequentially penetrates through the plurality of hinged square tubes and finally is connected with a reflector protection assembly (11) through the transition end block (10);
the reflector protection assembly (11) is connected to one end of the transition end block (10), the supporting body (1) is provided with a connecting device, and the reflector protection assembly (11) is locked on the supporting body (1) through the connecting device.
2. The retractable all-fiber current transformer fiber optic sensing ring of claim 1, further comprising: the sensitive ring body further comprises two waterproof sealing joints (4), one end of the first waterproof sealing joint (4) is fixedly connected to the L-shaped supporting body (1) at the position where the sensitive optical fiber (2) penetrates out, the other end of the first waterproof sealing joint penetrates into the first hinged square tube (5), and the second waterproof sealing joint (4) is connected between the last hinged square tube and the transition end block (10).
3. The retractable all-fiber current transformer fiber optic sensing ring of claim 2, further comprising: the support body (1) is provided with a groove, the support body (1) is connected with an upper cover (3), and the upper cover (3) is fixed on the upper part of the support body (1) and seals the groove.
4. A retractable all-fiber current transformer fiber optic sensing ring according to claim 2 or 3, characterized in that: the sensitive optical fiber (2) is an armored optical cable (7) at the position between the two waterproof sealing joints (4).
5. The retractable all-fiber current transformer fiber optic sensing ring of claim 1, further comprising: the two hinged square pipes are connected through a plugging screw (8) to serve as a rotating shaft, and meanwhile the plugging screw (8) is rotated to be used for adjusting the hinge tightness.
6. The retractable all-fiber current transformer fiber optic sensing ring of claim 1, further comprising: the support body (1) comprises two sections of long strip parts with one end integrally connected, and an included angle between the two sections of long strip parts is 60-120 degrees.
7. The retractable all-fiber current transformer fiber optic sensing ring of claim 1, further comprising: the reflector protection assembly (11) comprises a reflector (14), a bracket (15), a sleeve head (16) and a locking part, wherein the bracket (15) is fixedly connected with the transition end block (10), the reflector (14) is placed in a containing groove of the bracket (15) for protection, the sleeve head (16) is connected to the end part of the bracket (15), the side surface of the sleeve head (16) is protruded relative to the bracket (15) to form a protruding part, and the locking part is connected to one side of the protruding part, which is opposite to the bracket (15);
the connecting device comprises an inserting groove, a reed (12) and a locking counter bore, the inserting direction of the inserting groove is the length direction of the groove of the supporting body (1), the width of the long side of the supporting body (1) is the width of the inserting groove, the inserting groove is a tiger mouth type, the locking counter bore is matched with the locking part, and the reed (12) is arranged on one side of the supporting body (1) combined with the protecting component (11).
8. The retractable all-fiber current transformer fiber optic sensing ring of claim 7, further comprising: the locking part is a spring plunger (17), the spring plunger (17) comprises a column body, a spring and a sphere, the spring is positioned in the column body, the sphere is positioned at one end of the column body, which is opposite to the bracket (15), the spring abuts against the sphere, and the sphere is opposite to the locking counter bore.
9. The retractable all-fiber current transformer fiber optic sensing ring of claim 7, further comprising: the bracket (15) is provided with a containing groove, the width of the middle part of the containing groove is smaller than the width of the two ends, the reflecting mirror (14) is positioned at the position with larger width of the containing groove, and the position with smaller width of the middle part is used for blocking the movement of the reflecting mirror (14) in the containing groove.
10. A retractable all-fiber current transformer fiber optic sensing ring according to claim 3, wherein: the sensitive optical fiber (2) is connected with a 1/4 wave plate (13), the 1/4 wave plate (13) is arranged in a groove of the supporting body (1), and the 1/4 wave plate (13) is arranged at a position right above the reflecting mirror (14);
the optical fiber connected with the rear end of the 1/4 wave plate (13) can transmit the optical signal in the sensitive ring to the rear-end photoelectric signal processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211614596.5A CN116087594A (en) | 2022-12-13 | 2022-12-13 | Open-close type all-fiber current transformer fiber sensitive ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211614596.5A CN116087594A (en) | 2022-12-13 | 2022-12-13 | Open-close type all-fiber current transformer fiber sensitive ring |
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| Publication Number | Publication Date |
|---|---|
| CN116087594A true CN116087594A (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211614596.5A Pending CN116087594A (en) | 2022-12-13 | 2022-12-13 | Open-close type all-fiber current transformer fiber sensitive ring |
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| CN (1) | CN116087594A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347701A (en) * | 2023-12-05 | 2024-01-05 | 北京世维通光智能科技有限公司 | Optical fiber current detection device |
-
2022
- 2022-12-13 CN CN202211614596.5A patent/CN116087594A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347701A (en) * | 2023-12-05 | 2024-01-05 | 北京世维通光智能科技有限公司 | Optical fiber current detection device |
| CN117347701B (en) * | 2023-12-05 | 2024-04-12 | 北京世维通光智能科技有限公司 | Optical fiber current detection device |
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